Wrench.



. f Patented May 2|, I90I. w. H. PETERS.

No. 674,8l4.

W R E N C H lApplicption flied Dec. 15, 1899.)

(No Model.)

wLfncSse 5 f run-2m w. mum-um NTTnn STATES PATENT OFFICE.

WILLIAM H. PETERS, OF HOQUIAM, WASHINGTON, ASSIGNOR TO EDWARD A. BALDWIN, OF PORTLAND, OREGON.

WRENCH.

SPECIFICATION forming part of Letters Patent No. 674,814, dated May 21, 1901.

Application filed December 15, 1899. Serial No. 740,457. (No model.)

T at whom it may concern: Like letters refer to like parts in both the Be it known that 1, WILLIAM H. PETERS, a drawings and description thereof. citizen of the United States, and a resident Referring to the drawings, the outer jaw a of I-Ioquiam, Chehalis county, and State of is rigidly fixed on the head of the shank b. 5 Washington, have invented a new and useful The shank consists of two jointed parts, the Automatic Wrench, of which the following is lower, of which, 1), is-adapted to operate as a a specification, reference being had to the aclever. To form the joint uniting the two porcompanying drawings as a part thereof. tions of the shank, the lower end Z) of the My invention relates to wrenches or spanupper portion of the shank is reduced, the 1o ners of the monkey-wrench type; and the obhead of the lower portion 1) is forked at b to ject of my invention is to obtain an article receive the reduced partb andarivet b holds of manufacture which will be automatic or the parts together. Projectinglaterally from self-adjusting in its operation. To accomthe lever b is a lug 0, having an annular replish this, thelower or innerjaw of my wrench cess or socket on the upper side, the lug c 15 is slidably mounted on the upper part of the projecting at an acute angle with respect to shank. Said shank is composed of twojointed the portion or member I), so as to be adapted parts, the lower of which acts as a lever, and to the operations of the link (I, as illustrated a link or member connects such lever part in Fig. 1. The upper portion of the shank with the movable jaw andv moves the latter may be of quadrangular form, and on this 20 against or from the fixed outer or upper jaw portion of the shank is'slidably mounted a responsively to the manipulation of the movable jaw a, having an aperture correwrench. Thus all that is required in using spending to this form of the shank. On the my wrench is to lift the head, so as to open under side of the movable jaw ct is also proor spread the jaws, which may then be placed vided an annular recess or socket. 25 on the nut to be turned, and by now manipu- (Z is a link having rounded heads or ends, lating the wrench in the usual way the jaws which areinserted in therecesses or sockets in are closed upon the nut, the force with which the lug c and the movable jaw. To keep the the jaws grip or hold the nut being proporlink from falling out of place, thelower head tionate to the force required to turn the nut. or end may be provided with a groove, like d, 0 Of course the wrench must be so adjusted to receive a set'screw e for that purpose prothat the lever part of the shank will be opervided in the lug c, or else the rim or verge of ated against the direction of resistance of the either of the recesses in the movable jaw or nut or object being held. lug o,orboth, maybe slightly spread, by means My invention may be cheaply and strongly of a few blows of a hammer, to hold said link 5 rnade,consisting of but few parts,all of which in place, the link in this case being made will be more clearly understood from the slightly narrower, so that the heads thereof drawings and description thereof hereinafter will not bind in said recesses. given. With this explanation of my invention its In the drawings, Figure 1 is an elevation operation will be readily understood. When 0 40 of my wrench, showing the same as about apdesired to apply the same to a nut, the jaws plied toa nut and the dotted lines showing of the wrench are first opened, the Wrench set the lever part of the shank and handle as on the nut, and the wrench operated as usual. moved in the direction in which the nut desig- The movement of the lever part of the shank nated by N is to be forced. Fig. 2 is a front in thedirection in which the nutis to be turned 5 45 end elevation. Fig. 3 is a detail in perspecwill drive the movable jaw upward and firmly tive of the movable jaw. Fig. 4 isa similar set the jaws on the nut, the hold on the nut detail of the link or member (1, and Figs. 5 becoming greater as the wrench is turned. and 6 are details showing means for holding In the drawings, the under surface of the the heads or ends of the link (1 against falling fixed or outer jaw is shown serrated; but this 50 out of their socket-s or recesses in the lug 0 construction of course is optional. In small and movable jaw. wrenches constructed in accordance with my invention the same may be manipulated with one hand, using the forefinger to lift the head to open the jaws and in starting the movable jaw to close upon the object to be engaged. In larger wrenches one may have to manipulate the Wrench with both hands.

Having thus fully described my invention, what I claim, and desire to secure by Letters Patent, is-

1. In the wrench, the combination of the shank, or handle, comprising two members, I), b, pivotally united, the upper member being provided with a fixed jaw, and the lower member having a projecting lug, 0, provided on its upper surface with a transverse slot enlarging downwardly into a parallel annular cavity or socket; the movable jaw, a, slidably mounted on the member, I), and having on its under projecting surface, a transverse slot enlarging upwardly into a parallel, annular cavity or socket; the connecting-link, (1, having annular ends, or heads, adapted to be inserted in the sockets of the said lug, c, and movable jaw, a; and means for retaining the heads of the link, 61, in their sockets against lateral displacement, substantially as described.

2. In the wrench, the combination of the shank, or handle, comprising two members, I), b, pivotally united, the upper member being provided With a fixed jaw, and the lower memher having a projecting lug,'c, provided on its upper surface with a transverse slot enlarging downwardly into a parallel annular cavity or socket; the movable jaw, ct, slidably mounted on the member, 17, and having on its under projecting surface, a transverse slot enlarging upwardly into a parallel, annular cavity, or socket; the connecting-link, d, having annular ends, or heads, adapted to be inserted in the sockets of the said lug, c, and movable jaw, a; the heads of said connecting-link, 01, being of lesser width than the length of their said sockets, and the edges of said sockets being slightly spread to retain the link in place, substantially described.

In testimony whereof I have hereunto subscribed my signature, this 13th day of November, 1899, in the presence of two wituesses.

WILLIAM H. PETERS.

Witnesses:

ANDREW BRUCE, THAYER LAMB. 

